Majorowicz, Jacek. “Permafrost at the Ice Base of Recent Pleistocene Glaciations–Inferences from Borehole Temperature Profiles”. Bulletin of Geography. Physical Geography Series, no. 5 (December 28, 2012): 7–28. Accessed July 4, 2025. https://apcz.umk.pl/BOGPGS/article/view/v10250-012-0001-x.